I would like to hire a C++ Programmer / CUDA compiling

Hi I need good programer, on simple project. var1 FA12FA14 var2 EF12EG12 void HASH(var1 , var2) HASH function is RIPEMD64 Need to be runned on gpu. Loops and main are ready to be used as console app on WIN10 but using CPU threads. I need it to be used on my GPU rigs. (6xGeforce 1080ti) And optimize it to work on max... Input is HEX (FA12FA14EF12EG12) and output is HEX (FA12FA14EF12EG12) hashcat can be used, but need to make my HASH function useable on hashcat. And not sure how in hascat put input from 0000000000000000 to FFFFFFFFFFFFF